/*
  ==============================================================================

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
   copyrightable work, you agree to the terms of the JUCE End User Licence
   Agreement, and all incorporated terms including the JUCE Privacy Policy and
   the JUCE Website Terms of Service, as applicable, which will bind you. If you
   do not agree to the terms of these agreements, we will not license the JUCE
   framework to you, and you must discontinue the installation or download
   process and cease use of the JUCE framework.

   JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
   JUCE Privacy Policy: https://juce.com/juce-privacy-policy
   JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/

   Or:

   You may also use this code under the terms of the AGPLv3:
   https://www.gnu.org/licenses/agpl-3.0.en.html

   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
   WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.

  ==============================================================================
*/

#pragma once

#include "../jucer_JucerDocument.h"
#include "../jucer_UtilityFunctions.h"
#include "../../ProjectSaving/jucer_ResourceFile.h"

//==============================================================================
class JucerFillType
{
public:
    JucerFillType()
    {
        reset();
    }

    JucerFillType (const JucerFillType& other)
    {
        image = Image();
        mode = other.mode;
        colour = other.colour;
        gradCol1 = other.gradCol1;
        gradCol2 = other.gradCol2;
        gradPos1 = other.gradPos1;
        gradPos2 = other.gradPos2;
        imageResourceName = other.imageResourceName;
        imageOpacity = other.imageOpacity;
        imageAnchor = other.imageAnchor;
    }

    JucerFillType& operator= (const JucerFillType& other)
    {
        image = Image();
        mode = other.mode;
        colour = other.colour;
        gradCol1 = other.gradCol1;
        gradCol2 = other.gradCol2;
        gradPos1 = other.gradPos1;
        gradPos2 = other.gradPos2;
        imageResourceName = other.imageResourceName;
        imageOpacity = other.imageOpacity;
        imageAnchor = other.imageAnchor;

        return *this;
    }

    bool operator== (const JucerFillType& other) const
    {
        return mode == other.mode
            && colour == other.colour
            && gradCol1 == other.gradCol1
            && gradCol2 == other.gradCol2
            && gradPos1 == other.gradPos1
            && gradPos2 == other.gradPos2
            && imageResourceName == other.imageResourceName
            && approximatelyEqual (imageOpacity, other.imageOpacity)
            && imageAnchor == other.imageAnchor;
    }

    bool operator!= (const JucerFillType& other) const
    {
        return ! operator== (other);
    }

    //==============================================================================
    void setFillType (Graphics& g, JucerDocument* const document, const Rectangle<int>& parentArea)
    {
        if (document == nullptr)
        {
            jassertfalse;
            return;
        }

        if (mode == solidColour)
        {
            image = Image();
            g.setColour (colour);
        }
        else if (mode == imageBrush)
        {
            loadImage (document);

            Rectangle<int> r (imageAnchor.getRectangle (parentArea, document->getComponentLayout()));

            g.setTiledImageFill (image, r.getX(), r.getY(), (float) imageOpacity);
        }
        else
        {
            image = Image();

            Rectangle<int> r1 (gradPos1.getRectangle (parentArea, document->getComponentLayout()));
            Rectangle<int> r2 (gradPos2.getRectangle (parentArea, document->getComponentLayout()));

            g.setGradientFill (ColourGradient (gradCol1, (float) r1.getX(), (float) r1.getY(),
                                               gradCol2, (float) r2.getX(), (float) r2.getY(),
                                               mode == radialGradient));
        }
    }

    String generateVariablesCode (String type) const
    {
        String s;

        switch (mode)
        {
            case solidColour:
                s << "juce::Colour " << type << "Colour = " << CodeHelpers::colourToCode (colour) << ";\n";
                break;

            case linearGradient:
            case radialGradient:
                s << "juce::Colour " << type << "Colour1 = " << CodeHelpers::colourToCode (gradCol1) << ", " << type << "Colour2 = " << CodeHelpers::colourToCode (gradCol2) << ";\n";
                break;

            case imageBrush:
                break;

            default:
                jassertfalse;
                break;
        }

        return s;
    }

    void fillInGeneratedCode (String type, RelativePositionedRectangle relativeTo, GeneratedCode& code, String& paintMethodCode) const
    {
        String s;

        switch (mode)
        {
            case solidColour:
                s << "g.setColour (" << type << "Colour);\n";
                break;

            case linearGradient:
            case radialGradient:
                {
                    String x0, y0, x1, y1, w, h, x2, y2;
                    positionToCode (relativeTo, code.document->getComponentLayout(), x0, y0, w, h);
                    positionToCode (gradPos1, code.document->getComponentLayout(), x1, y1, w, h);
                    positionToCode (gradPos2, code.document->getComponentLayout(), x2, y2, w, h);

                    s << "g.setGradientFill (juce::ColourGradient (";

                    auto indent = String::repeatedString (" ", s.length());

                    s << type << "Colour1,\n"
                      << indent << castToFloat (x1) << " - " << castToFloat (x0) << " + x,\n"
                      << indent << castToFloat (y1) << " - " << castToFloat (y0) << " + y,\n"
                      << indent << type << "Colour2,\n"
                      << indent << castToFloat (x2) << " - " << castToFloat (x0) << " + x,\n"
                      << indent << castToFloat (y2) << " - " << castToFloat (y0) << " + y,\n"
                      << indent << CodeHelpers::boolLiteral (mode == radialGradient) << "));\n";
                    break;
                }

            case imageBrush:
                {
                    auto imageVariable = "cachedImage_" + imageResourceName.replace ("::", "_") + "_" + String (code.getUniqueSuffix());

                    code.addImageResourceLoader (imageVariable, imageResourceName);

                    String x0, y0, x1, y1, w, h;
                    positionToCode (relativeTo, code.document->getComponentLayout(), x0, y0, w, h);
                    positionToCode (imageAnchor, code.document->getComponentLayout(), x1, y1, w, h);

                    s << "g.setTiledImageFill (";

                    const String indent (String::repeatedString (" ", s.length()));

                    s << imageVariable << ",\n"
                      << indent << x1 << " - " << x0 << " + x,\n"
                      << indent << y1 << " - " << y0 << " + y,\n"
                      << indent << CodeHelpers::floatLiteral (imageOpacity, 4) << ");\n";

                    break;
                }

            default:
                jassertfalse;
                break;
        }

        paintMethodCode += s;
    }

    String toString() const
    {
        switch (mode)
        {
            case solidColour:
                return "solid: " + colour.toString();

            case linearGradient:
            case radialGradient:
                return (mode == linearGradient ? "linear: "
                                               : " radial: ")
                        + gradPos1.toString()
                        + ", "
                        + gradPos2.toString()
                        + ", 0=" + gradCol1.toString()
                        + ", 1=" + gradCol2.toString();

            case imageBrush:
                return "image: " + imageResourceName.replaceCharacter (':', '#')
                        + ", "
                        + String (imageOpacity)
                        + ", "
                        + imageAnchor.toString();

            default:
                jassertfalse;
                break;
        }

        return {};
    }

    void restoreFromString (const String& s)
    {
        reset();

        if (s.isNotEmpty())
        {
            StringArray toks;
            toks.addTokens (s, ",:", StringRef());
            toks.trim();

            if (toks[0] == "solid")
            {
                mode = solidColour;
                colour = Colour::fromString (toks[1]);
            }
            else if (toks[0] == "linear"
                      || toks[0] == "radial")
            {
                mode = (toks[0] == "linear") ? linearGradient : radialGradient;

                gradPos1 = RelativePositionedRectangle();
                gradPos1.rect = PositionedRectangle (toks[1]);
                gradPos2 = RelativePositionedRectangle();
                gradPos2.rect = PositionedRectangle (toks[2]);

                gradCol1 = Colour::fromString (toks[3].fromFirstOccurrenceOf ("=", false, false));
                gradCol2 = Colour::fromString (toks[4].fromFirstOccurrenceOf ("=", false, false));
            }
            else if (toks[0] == "image")
            {
                mode = imageBrush;
                imageResourceName = toks[1].replaceCharacter ('#', ':');
                imageOpacity = toks[2].getDoubleValue();
                imageAnchor= RelativePositionedRectangle();
                imageAnchor.rect = PositionedRectangle (toks[3]);
            }
            else
            {
                jassertfalse;
            }
        }
    }

    bool isOpaque() const
    {
        switch (mode)
        {
        case solidColour:
            return colour.isOpaque();

        case linearGradient:
        case radialGradient:
            return gradCol1.isOpaque() && gradCol2.isOpaque();

        case imageBrush:
            return image.isValid()
                     && imageOpacity >= 1.0f
                     && ! image.hasAlphaChannel();

        default:
            jassertfalse;
            break;
        }

        return false;
    }

    bool isInvisible() const
    {
        switch (mode)
        {
        case solidColour:
            return colour.isTransparent();

        case linearGradient:
        case radialGradient:
            return gradCol1.isTransparent() && gradCol2.isTransparent();

        case imageBrush:
            return approximatelyEqual (imageOpacity, 0.0);

        default:
            jassertfalse;
            break;
        }

        return false;
    }

    //==============================================================================
    enum FillMode
    {
        solidColour,
        linearGradient,
        radialGradient,
        imageBrush
    };

    FillMode mode;
    Colour colour, gradCol1, gradCol2;

    // just the x, y, of these are used
    RelativePositionedRectangle gradPos1, gradPos2;

    String imageResourceName;
    double imageOpacity;
    RelativePositionedRectangle imageAnchor;

    //==============================================================================
private:
    Image image;

    void reset()
    {
        image = Image();
        mode = solidColour;
        colour = Colours::brown.withHue (Random::getSystemRandom().nextFloat());
        gradCol1 = Colours::red;
        gradCol2 = Colours::green;
        gradPos1 = RelativePositionedRectangle();
        gradPos1.rect = PositionedRectangle ("50 50");
        gradPos2 = RelativePositionedRectangle();
        gradPos2.rect = PositionedRectangle ("100 100");

        imageResourceName.clear();
        imageOpacity = 1.0;
        imageAnchor = RelativePositionedRectangle();
        imageAnchor.rect = PositionedRectangle ("0 0");
    }

    void loadImage (JucerDocument* const document)
    {
        if (image.isNull())
        {
            if (document != nullptr)
            {
                if (imageResourceName.contains ("::"))
                {
                    if (Project* project = document->getCppDocument().getProject())
                    {
                        JucerResourceFile resourceFile (*project);

                        for (int i = 0; i < resourceFile.getNumFiles(); ++i)
                        {
                            const File& file = resourceFile.getFile (i);

                            if (imageResourceName == resourceFile.getClassName() + "::" + resourceFile.getDataVariableFor (file))
                            {
                                image = ImageCache::getFromFile (file);
                                break;
                            }
                        }
                    }
                }
                else
                {
                    image = document->getResources().getImageFromCache (imageResourceName);
                }
            }

            if (image.isNull())
            {
                const int hashCode = 0x3437856f;
                image = ImageCache::getFromHashCode (hashCode);

                if (image.isNull())
                {
                    image = Image (Image::RGB, 100, 100, true);

                    Graphics g (image);
                    g.fillCheckerBoard (image.getBounds().toFloat(),
                                        (float) image.getWidth() * 0.5f, (float) image.getHeight() * 0.5f,
                                        Colours::white, Colours::lightgrey);

                    g.setFont (12.0f);
                    g.setColour (Colours::grey);
                    g.drawText ("(image missing)", 0, 0, image.getWidth(), image.getHeight() / 2, Justification::centred, true);

                    ImageCache::addImageToCache (image, hashCode);
                }
            }
        }
    }
};
